Nut-lock.



vUnire@ @raras ATENE Erich.

GEORGE W. FORTIER, OF GRANDIRAPIDS, IWIIOI'IIGAN.

NUTQLOCK.

SPECIFICATION forming part of Letters Eatent No. 678,775, dated July 1 6,' 190i.

Application filed September 24, 1900. Serial No. 31,001. (No model.)

` To @ZZ whom it may concern:

Beit known that I, GEORGE W. FORMER, a citizen ofthe United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification.

My invention relates to improvements in nut-locks; and its object is to provide a nutlock that, while perfectly reliable as a nutlock, may be readily unlocked to remove the nut when desired. I attain this object by the mechanism illustrated inthe accompanying drawings,- in which- Figure l isabottom plan of a nut, showing my lock in place. nut and washer cut away at a; a: to show the application of the lock, and Fig. 3y is a top plan of the washer.

Similar letters refer to similar throughout the several views.

A represents an ordinary square nut into which I form a slot O vfor the reception of a pawl O, for which I form a pivot-bearing on the nut by striking an offset from the nut each side of and into the slot, as indicated at c in Figs. l and 2, and make a corresponding notch in the lower edge of the pawl O, as at c', which fits over the offsets and forms the bearing for the pawl. To actuate the pawl, I place a spring, as E, between the upper edge of the pawl and the top of the slot. I form a small notch c in the Lipper edge of the pawl just back of the bearing, so that the spring will enter and avert the danger of sliding out of place. The bearing of the spring on the parts pawl is so adjusted that the pressure upon the end b' is much greater than that back of the bearing, and the end may be raised and lowered without danger of raising the pawl from its bearing on the offsets c.

Fig. 2 is an elevation of a The washer, which forms an important ele` ment in this invention, is formed with a series of serrations h, designed to be directly in the path of the pawl O, so that when the nut is turned to secure an object to place the point of the pawl will engage the serrations and prevent the nut from turning backward until the pawl has been raised from such contact, which may be done in severalways; but I lind the most available way to be to enter a short wedge, as D, between the back end of the pawl and the top of the slot. I prefer the use of the wedge, as it can be driven in flush with the surface of the side of the nut and will not interfere with the use of a wrench for manipulating the nut.

I find the use of a downwardly-projecting point b on the lower surface of the washer a great advantage for use upona wood base.

Having thus fully described my invention, what I claim as new, and desire t0 secure by Letters Patent, is-

In combination with awasher having a serrated surface, a nut having a slot formed in its lower surface and extending tangentially from near the center orifice of the nut to the side thereof,olfsets struckfrom the nutin each side of the slot, a pawl having a notch in the edge engaging said offsets and forming a pivot-bearing for the pawl, andan actuatingspring above the pawl, substantially as and for the pupose set forth.

Signed at Grand Rapids, Michigan, September la, 1900.

GEO. Vif. FOR'llEIt.

In presence of- Jas. E. BAKER, I. J. CILLEY. 

